20671216

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{31511}}^1$

素因数の和:31560

約数の個数: 20

約数和(自身を含む): 41028624

約数和(自身を除く): 20357408

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 31511, 63022, 126044, 252088, 504176, 1291951, 2583902, 5167804, 10335608, 20671216]

約数ペア:

[(1, 20671216), (2, 10335608), (4, 5167804), (8, 2583902), (16, 1291951), (41, 504176), (82, 252088), (164, 126044), (328, 63022), (656, 31511)]